The museum was arranged in the preserved basement of the old convent buildings. The most precious relic is the authentic bakery with the preserved kiln and tools used for baking bread and the floor on which St. Sister Faustina, the Apostle of The Divine Mercy, walked. She lived in the Płock convent in the years 1930 – 1932, working in a bakery shop and helping in the kitchen and with the baking of bread. The photos and exhibits in the museum serve to commemorate St. Sister Faustina’s stay in this convent by showing the history of the house, its life and work and illustrating her road to sanctity, as well as the history and development of the devotion to The Divine Mercy. The function of the museum is to deepen people’s knowledge of the life and mission of St. Sister Faustina.

However, the museum is currently closed owing to the ongoing construction work related to the expansion of the Shrine.